Drier.



W. V. MEYER.

DRIER.

APPLICATION FILED JAN-3.1914.

Patented Aug. 29, 1916.

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WILLIAM V. MEYER, OF CHICAGO, ILLINOIS.

DRIER.

Application filed January 3, 1914.

To all whom it may concern:

Be it known that I, WILLIAM V. MEYER, a citizen of the United States,residing at Chicago, county of Cook, and State of Illinois, have madecertain new and useful Improvements in Driers, of which the following isa specification.

My invention relates more particularly to that class of driers which isused for desiccating finely divided material and powders where it isnecessary and desirable to expose the individual particles to the hotair or gases passing through thedrier to the greatest possible extent,and it is applicable to drying grain, paint materials, chemicals, etc.

The invention is shown and described hereinafter as an improvement upona type of drier shown in patent to Meyer, No. 771,994, dated October 11,1904, but it will be evident from the detailed description that in someor all of its features it is applicable to other and various formsofdrier.

While in the following specification I have described and in theaccompanying drawing shown a preferred embodiment of my invention it isto be understood that the detailed disclosure is for the purpose ofexemplification only and that the scope of the invention is defined inthe following claims in which I have endeavored to distinguish it fromthe prior art so far as known to me without, however, relinquishing orabandoning any feature thereof.

In the accompanying drawing Figure 1 is a side elevation of a drier ofthe type to which my invention is applicable and Fig. 2 is an endelevation of the same on an en larged scale showing the improvedconstruction as it appears in operation.

Referring first to Fig. 1, the drier is seen to consist of an elongatedtube or cylinder .3 which is mounted upon anti-friction rolls 4, 4 uponstands 5, 5. It will be understood that the cylinder may be turned byany suitable mechanism. The material to be treated is supplied through achute 6, fragmentarily shown in Fig. 1, and as the drier revolvesprogresses gradually from one end to the other of the drier and isheated and dried by gases coming from the burner 7 mixed with such airas may be drawn into the heater and fed along with such gases orproducts of combustion. In common with. the device upon which my drieris an improvement it is composed of an outer shell Specification ofLetters Patent.-

Patented Aug. 29, 1916..

Serial No. 810,102.

or cylinder 8 and an inner shell 9 between vided with longitudinal ribs10 for a pur- 2' pose which will be described. The inner tube orcylinder is likewise provided with shelves 12 as in the formerconstruction but these shelves are different from those of the formerconstruction in features which will presently appear. The shelves 12 areall arranged tangentially with respect to the inner cylinder and areattached to their outer edges by straps 13 to the inner wall of theouter cylinder, the straps 13 being preferably located substantially inthe same plane with the respective shelves to which they are attached.The shelves 10 and 12, it will be understood, may and preferably doextend substantially the length of the drier but the straps 13 are ofcomparatively little breadth, it being only essential that they be broadenough to have the required strength to properly support the shelves 12.

In my improved drier the radial shelves found in the construction of thepatent referred to above, are omitted but the tangential shelves 12 areprovided on both sides thereof with series of longitudinal ribs 14, 15over which the material dribbles as the drier revolves. By omitting theradial shelves and providing the ribs referred to above, the materialbeing treated is dribbled as the drier revolves from one step to thenext the entire length of each shelf, the action being well shown inFig. 2 of the drawings. Thus, if we follow a particular group ofelements of the dried through a complete cycle, beginning at the bottomit is seen that the outer Wall of the drier receives most of thematerial at this point and as the drier revolves the granular or othermaterial being treated is first received upon the shelf projecting fromthe inner wall of the outer cylinder. As the shelf rises higher andturns toward the horizontal the material begins to dribble over the edgethereof and to fall upon the following tangential shelf extending fromthe inner cylinder. Were it not for the longitudinal ribs thereon thegranular material would slide down the face of the tangential shelf andinto the pocket between the latter and the inner cylinder. The ribs 1 f,however, intercept the material and it is dribbled over each ribsuccessively until it substantially occupies said pocket. As the shelfprojecting from the outer cylinder reaches a position near the top, thematerial thereon begins to be spilled or dribbled upon the rear face ofthe tangential shelf in advance of said outer shelf and likewise flowsover the edge of the successive ribs into the pocket between saidtangential shelf and the inner cylinder.- As the revolution of the driercontinues the pocket between the tangential shelves which has nowreceived all or practically all of the material, reaches a positionshown at the right of Fig. 2 in which the material begins to dribble ina reverse direction over the ribs upon the back of the more advancedtangential shelf and from the outer rib or lip thereon on to the back ofthe outer shelf in advance thereof and upon the further rotation of thedrier the material dribbles from said lip on to the cylindrical wall ofthe drier. This completes the cycle of operations of the drier and itwill be readily seen that by the omission of the radial shelves of theformer device and the provision of the ribs each particle of thematerial is exposed to the heated air or products of combustion a greatmany more times than would be possible with the old construction. 'Butfurthermore, I have found that by the particular manner in which thetangential shelves are attached to the outer shelf I avoid breakage andwear ing out which is incident to a construction in which the cylindersor tubes are connected together by radial bolts as heretofore. 7 Withthe repeated heating and cooling to which such driers are subjectedthere is a torsional effect upon the bolts which ultimately destroystheir connection to the cylinders by constantly straining and bendingthe same. On the contrary in my improved device as the metal parts heatup the shelves and their connections expand but in doing so merelyrotate the inner cylinder slightly with reference to the outer cylinderbecause of the tangential arrangement of said shelves and straps. Thusno material strain is put upon the metal and the driers last very muchlonger.

I claim:

1. A drier comprising an inner and an outer cylinder and shelves thereonby which in the revolution of the drier the material treated isrepeatedly sifted or dribbled from one element to another, connectingmeans between the outer and inner cylinder arranged substantiallytangential to the latter for the purpose described.

2. In a drier, an inner and an outer cylinder, substantially tangentialshelves arranged upon the former and connections from said shelves tothe outer cylinder.

3. In a drier of the class described, inner and outer concentriccylinders, tangential shelves upon the inner cylinder and connections inthe plane thereof to the outer cylinder.

4. In a drier of the class described, an inner and an outer cylinder,tangential shelves arranged on the inner cylinder, connections from saidshelves to the outer cylinder and shelves upon the interior of the outercylinder.

5. In a drier of the class described, an inner and an outer cylinder,tangential shelves arranged on the inner cylinder, longitudinal ribs onsaid tangential shelves and shelves arranged upon the outer cylinder.

6. In a drier, an inner and an outer cylinder, tangential shelvesarranged on the inner cylinder, longitudinal ribs upon each side of saidshelves and shelves upon the outer cylinder.

7. In a drier of the class described, an inner and an outer cylinder,shelves on the interior of the outer cylinder and on the exterior of theinner cylinders and longitudinal ribs on said shelves.

WILLIAM V. MEYER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

